Lubricating system for sewing machines



NOV. 22, 1932.. A, GRiEB ET AL y 1,888,799

LUBRICATING SYSTEM FOR SEWING MACHINES Filed Aug. 20, 1931 4 ShretS-Sheefl 1 Nov. 22, 1932.. A. GRIEB ET AL 1,838,799

' LUBRICATING SYSTEM'FOR SEWING MACHINES Filed Aug. 2o, 1951 4 sheets-sheet 2 ulllllllllll di da @www Nov'. 22, 1932. A, GRIEB ET AL 1,888,799

I LUBRICATING SYSTEM FOR SEWNG MACHINES Filed Aug. 20, 1931 4 Sheets-Sheet 3 lA. AA

Nov. 22, 1932.5 v A. GRIEB ET AL. l 1,888,799

LUBRICATING SYSTEM FOR SEWNGI MACHINES Filed Aug. 20, 1931 4 Sheets-Sheet 4 Patented Nov. 22, 1932 UNITED ASTATES ALFRED GRIEIB, F ELIZABETH, AND NICHOLAU'S KNAU-S, 0F N'E'W'ARK NEW JERSEY, l

PATENT OFFICE ASSIG'NORS TO THE SINGER MANUFACTURING COMPANY, OF ELIZABETH, NEW IEB- SEY, A CORPORATION 0F NEW JERSEY ITUBRICATING SYSTEM FOR SEWING MACHINES Application led August 20, 1931. Serial No. 558,228.

This invention relates to sewing machines, more particularly of the type having a bed and a raised cloth-plate between the levels of Y which is journaled thc main-shaft and variafter described and particularly pointed out in the appended claims.

The features of the invention and the advantages attained thereby will be readily understood by those skilled in the vart from the following detailed description of a preferred embodiment of the invention illustrated in the accompanying'drawings in which Fig. 1 is a front-side elevation, partly in section, of the machine. Fig. 2 is a section on the line 2 2, Fig. 1. Fig. 3 is a'horizontal section through one of the main-shaft bearings on the line 3 3, Fig. 1. Fig..4 is a rear side elevation, partly in section, of the machine. Fig. is atransverse vertical'sectio'n on the line 5 5, Fig."1. Fig. 6 is a longitudinal ,verticalY section of the feed-rocker supporting shaft shown in Fig. 4. Fig. 7 is a left end elevation of the machine. Fig. 8 is a section on the line 8 8, Fig. 4. Fig. 9 is a section on the'line 9 9,'Fig. 4. Fig. 10 is a section on the line 10, Fig. 1. Fig. 10 is a perspective view of the bushing for the left end of the shaft shown in Fig. 10. Fig. 1()b is a section on the line 10b of Fig. 10. Fig. 11 is a vertical section longitudinally of the supporting shaft shown in Fig. 10. Fig. 12 is a section on the line 12-12, Fig.'1. Fig. 13 is a vertical section on the line 13 13, Fig. 7. Fig. 13a is a plan View. of the feed-lift and trimmer-actuating eccentrics. Fig. 14 is a section on the line 14-14, Fig. 5.= Fig. 15 is a section on the line -15, Fig. 7. Fig. 16 is a perspective View of the lubricator for the feed-actuating eccentric. Fig. 17 is a horizontal section through the ring of the lubricator shown in Fig. 16. Fig. 18 is a' 53. horizontal section through the bearing bushing shown in Fig. 13and Fig. 19 is a side lview of the main feed-bar.

The machine comprises a frame including a ilat bed casting 1 formed in its under face with an oil-cavity 2 the bottom of which is closed by the oil-tight removable coverplate 3.

The stitch-forming and feedin mechanisms of the machine, as well as 't e mainshaft and actuating elements carried thereby, are supported in their usual accessible ositions above the bed 1 and exterorl o the oil-cavity 2 by suitable lugs arising rom the bed 1 and preferably cast integral therewith.

The main-shaft 4 is journaled at one end in the bushing 5 received in the main bedlug 6 upon which the sewin machine bracket-arm or gooseneck 7 is rigidly mounted said gooseneck terminating in the usual hea 8 for the support of the usual needle-bar 9 carryin the needle 10.v

f The ushinfr 5 has a longitudinally extendin wicklled channel 11 in the bottom of its caring surface and has a wick-filled cavity 12 in its outer surface, which cavity is cut through into communication with the channel 11. The lug 6 is drilled out to receive the wick 13 having an anchor knot 14 at its upper end to prevent sagging, which knot 14 is in engagement ywith the wicking'in the cavity 12. The wick 13 conducts oil from the cavity 2 upwardly through vthe bed 1 and lug 6 to the bearin bushin 5 where it is distributed lon itu inally o the portion of the main-sha t within the bushin 5. The spiral groove 14 in the; main-saft c or inner end of the bushing 5, Fig. 1, where the escapinvr oil is caught in the undercut groove 15 of the collar 16 on themain-shaft and is thrown centrifugally through the duct.

17 to the ball-crank bearing 18 of the needle-` bar reciprocating mechanism.

Oil passes from the bearing 18 upwardly through the hollow pitman19 to the bearin connection 20 between the itman 19 an the needle-lever arm 21 whic latter is fixed to the rock-shaft 22'journaled in the bearing bushings 23, 23l carried by the gooseneck 7.

arries the oil toward the left\ @il is carried from the oil-cup 24 to one of the bushings 23 through the duct 25 and passes to the other bushing through the wick-nlled axial operture 26 in the shaft 22. The rock-shaft 22 has fixed thereto the leverarm 22a which is connected by the link 22 to the needle-bar 9.

The main-shaft 4 is journaled at its other end, Fig. 13 in the bearing bushing 27 carried b thev ed-lug 28 and formed with the wicklled channel 29 and cavity 30 to which the oil is conducted from the main reservoir 2 through the hole 31 drilled in the bed-lug 28; the hole 31 being illed with the wick 31 the upper end of which is formed with the anchor knot 31".

Cooperating with the needle is the usual threaded looper 32 and overedge implement 33. "lhe looper 32 is mounted on the loopercarrier 34 having a tubular hub 35 journaled on the stationary horizontal `shaft 36 fixed in the central lug or u ward extension 37 of the-bed 1; The sha .t 36 has in its under side a wick-lilled channel 38 which conducts the oil from the wick-filled supply hole 39 from the main-reservoir 2 to the bearing surfaces between the sleeve and shaft 36.

The sleeve 35 is formed with a boss 40 which is socketed to receive a pin 41 embraced by an actuating sleeve 42 fixed to the bearing pin 43 journaled in the free end of the arm 44 of a bell-crank lever 44, 45, the

arm 45 o-which carries the overedge implement 33. The boss 40 and pin 41 are formed with connected passageways 46, 47 to conduct lubricant from the bearing pin 36 to the outer surface of the pin 41.

The bell-crank lever 44, 45 has a 'sleevelike hub 48, Fig. 10, which is journaled on the stationary shaft 49 fixed at its ends in the lugs 50, 51, rising from the bed 1. The hub 48 has fixed to it a third arm 52 carrying the ball-headed stud 53 which is connected by the link 54 tothe ball-crank 55 tion with the wick-filled holes 62, 63 in the lugs 50, 51 leading upwardly from the main.

oil-cavity 2. The shaft 49 isl fixed at its reduced end in a bushing 64 having its under wall slabbed off at 65 to clear the wick-knot 62 which touches the wicking in the channels 61. The bushing `64 and shaft 49 may be inserted and removed after the knotted 5 wick 62 has been placed in its hole in the weaves feed-dog 67 and auxiliary feed-dog 68 carya .ried respectively, by the main feed-bar 69 and auxiliary feed-bar 70; the latter bar being ulcrumed at 71 on the main feed-bar. The main feed-bar 69 has ixed to its rear end the cross-pin 72 which is journaled in the upstanding arms 73, 73, Fig. 4, of the feed-rocker 74 journaled onv the stationary feed-rockerv supportin shaft 75 which is fixed in the bushings 76 in the bed-lugs 77. rl`he feedrocker 74 has fixed to it a crank-arm 78 which is connected by the pitman 79 to the adjustable feed-eccentric 80 slidably mounted as usual in a transverse groove 81 in the feedeccentric carrier 82 fixed to the main-shaft 4. rThe eccentricity of the eccentric 80, and thus the length ofthe feed-stroke of the main feeddog, is adjusted by turning the adjusting screw 83, Fig. 13, the head of which engages a slot 84 in the adjacent face of the feed-eccentric 80. y

rllhe feed-rocker-supportiug` shaft 75 hasV the wick-filled channels 85 whichabsorb oil from the knots 86 at the upper ends of the wicks 87 disposed in holes in the bed-lugs 77 and leading upwardly through the bed 1 from the main oil-cavity 2 in the under face of the bed. The wick-filled channels 85 distribute the oil along the shaft 75 from which a certain amount of oil is picked up and centriiugally thrown through the ducts'88 m tu the rocker-arms 73 to the bearings for the pin 72.

rlhe main feed-bar is supported by the pin 89, Figs. 5, 13 and 19. of the short vertical pitman 90 embracing the feed-lift eccentric 10:3 91 onthe main-shaft 4. The feed-lift eccentric 91 is formed integral with the trimmer-actuating eccentric 92 which is connected by the hollow pitman 93 to the trimmer-lever 94 fulcrumed at 95 on the frame and carry- 31.) ing the usual trimmer-blade 96 at its forward end. rThe main-shaft 4 is formed within the eccentrics 91 and 92 with a wick-filled channel 97 which conducts oil from the wicking 29.1250 the shaft-groove 98 and through the r1.5 duct 99 to the bearing surface of the trimmeractuating eccentric 92 from which oil is conducted through the duct 101 to the pin 102 which connects the 'Pitman 93 to the trimmerlever 94.

Oil also passesr from the channel 97 outwardly across the left end face of the feedlift eccentric 91 Fig. 13, to the feed-lift-eccentac bearing along which it is distributed by the spiral slit the trailing end of which 125 is 4cut through to conduct excess lubricant to the trimmer-actuating eccentric and assist in lubricating the latter and the pin 102 above. rllhere is freely mounted on the main-shaft 4 between the trimmer-actuating eccentric 92 and the feed-eccentric-carrier 82, a collar 103 formed in that face adjacent the feed- `eccentric-carrier 82 with a circular wick-filled channel 104 which is continuous with the wick-filled duct 105 leading downwardly from the collar 103 and into the main oilcavity 2. The channel 104 is overhung by the under-cut groove 106 in the adjacent face of 4the eccentric carrier 82. Leading through the eccentric-carrier 82 from the under-cut groove 106 is the duct 107 which terminates within the internal groove 108 in the feed-eccentric 80. The duct 107 does not interfere with the adjustment of the eccentric 80 and conducts lubricant from the collar 103 to the latter; the lubricant passing through the hole 108. to the eccentric bearing surface.

Oil is supplied to the main cavity 2 through the main oil-cup 109 and is conducted by the several wicks, as described, to the various bearings.

The removable plate 3 has fixed thereto the lug 110 having therein the blind screwthreaded hole 111 for reception of the fastening screw 112 b means of which the entire machine is firm y secured in operative position upon the felt pads 113 resting upon lugs 114 in the cast-iron pan 115 fixed to the tabletop 116. Surplus or spent oil may be drained from the pan 115 from time to trme through the pipe and drain-cock 117.

The usual throat-plate 118, over which the work passes, is su ported above the mainshaft 4, by the bedugs 28 and 51', the latter being an upward extension of the lug 51.

The usual cloth-plate, not shown, is supported at the level of thethroat-plate 118.

Having thus set forth the nature of the invention, what we claim herein is 1. A sewing machine comprising a framecasting including a flat bed recessed in its `under face to form an oil-cavity, stitch-forming and feeding mechanisms disposed above and carried by said bed externally of said oili5 cavitywickfilled conduits leading upwardly from said oil-cavitythrou h said bed to working bearingsof said mec anisms, and a removable plate secured to said bed and closing the bottom of said oil-cavity.

. 2. A sewin vmachine com rising a framecasting inclu ing a flat bed? recessed in its under face to form an oil-cavity, supporting lugs rising from saidbed, stitch-formmg and feeding mechanisms supported above and externally of said bed by said supporting lugs,

a main-shaft journaled above and externally of said bed, a system of wick-filled conduits leadin upwardly from said oil-cavity throug said bed-casting and supporting lugs C) to working bearings of the mam-shaft and stitch-forming and feeding mechanisms, and

a removable plate closing the bottom of said oil-cavity.

3. A sewing-machine comprising a frame- C3 casting including a flat bed recessed in its under face to form an oil-cavit stitch-forming and feeding mechanisms lsposed above and carried b said bed externally of said oilcavity, wicklled conduits 'leading upwardly from said oil-cavit through said bed to workin bearings o said mechanisms, and a remova le plate secured to said bed and closing the bottom of said oil-cavity, said plate being formed with a screw-threaded aperture for reception of a fastening screw, whereby the entire machine may be fixed to a supporting table-top.

4. A sewing machine com rising a framecasting including a flat be recessed in its under face to form an oil-cavity,l said bed having supporting lugs rising therefrom, bearing-elements inserted in said supporting lugs above said bed and externally of said oilcavity, said bearing-elements having wicklled channels in their bearing surfaces, said bed and bed-lugs being drilled out to form conduits leading upwardly from said oil-cavity through said bed to said channeled bearing-elements, and wicks disposed in said conduits and in capillary working relation with said wick-filled channels.

5. A. sewing machine having a at bed formed with an oil-cavity, a main-shaft journaled above the upper side of said bed, feeding mechanism including a feed-dog and an adjustable feed-actuating eccentric on said main-shaft, and means for conductin lubricant from said oil-cavity upwardly t rough4 said bed to said feed-actuating eccentric.

6. A sewing machine having a rotary shaft, a stationary ring-member surrounding said shaft and having a recess in one face thereof an eccentric support fixed tosaid shaft a jacent said ring-member and having an under-cut groove overhang'ing said recess, said support also having a` conduit leadin from said groove through and beyond sai su port lengthwise ofsald shaft, an eccentric a justably mounted on said support and formed with an internal recess overhanging the delivery end of said conduit, and means for conducting lubricant to the recess in said stationary ring-member.

7. A sewing machine having a flat bed formed with an oil-cavity, a main-shaft journaled in spaced bearings above said bed, an eccentric carried by said shaft between and spaced from said bearings, said eccentric 'lliv having an under-cut recess, and means for conducting lubricant from said oil-cavity to said recess, said means including a stationar ring-shaped member on said main-shaft a jacent said eccentric and having a conduit leading to said oil-cavity.

8. A sewing machine having a flatbed formed with an foil-cavity, a reciprocatin needle, a complemental threaded looper an an overed e implement journaled on said bed above an externall' of said oil-cavity, said bed having wick-li ed passageways leading from said cavity u wardly to the hearings for said looper an overedge implement, a hollow in rigid with said looper and receiv# ing oil rom the looper-bearing, a sleeve embracing said pin, an actuating connection between said overedge implement and said sleeve for driving said loo er, and means for driving said everedge imp ement.- Y

9. A sewing machine having a fiat bed formed with an oil-cavit a lug yrising from said bed, a main-shaft hearing bushing in said lug, a main-shaft journaled in said bushing, a ooper-actuating crank on said mainshat adjacent one end of said bushing, feedliit and Atrimmer-actuating eccentrics on said main-'shaft adjacent the other end of said bushing, means for conductin from/said cavitythrough said. ug to said bearing bushing, and means for conducting lubricant from the opposite ends of said bush-y ing to said louper-actuating crank and to said feed-lift and trimmer-actuating eccentrics. l0. In a sewin machine, a dat hed having an oil-cavit a ig rising from said bed, a stationary s aft removably fixed in said lug, said shaft havin a wick-filled channel en tendin lengthwise thereof, said lug having a wie r-lled aperture leadin upwardly from said oil-cavity into capil ary connection with said channel, and a working element journaled on said stationary shaft..

" 11. lln a sewing machine, a flatbed formed from with an oil-cavity, spaced lugs risin at its said hed, a stationary shaft mounte opposite ends in said spaced lugs, said shaft y having a wiclr-lled channel extendingK ongisus tudinally thereof, said lugs having wie lled apertures leading upwardly from said oilcavity and in capillary connection with said channel, and a rocking sleeve-member journaled on said stationar shaft.

12. lin a sewing macpine, a frame including a flat bed formed with an oil-cavity and with a plurality of lugs rising therefrom,

stitch-forming and feeding mechanisms jouri nailed in said ame and including parts :lournaled in said-lugs, removable bearing elements for said parts, having wich-ed chan nels, said lugs having holes therein leading upwardly from said oil-cavity, and wicks in said holes in capillary connection with saidwick-lilled channels. v

13. 'llhe structure set forth in claim l2 with means for anchoring the wclrs in the holes in the lugs.

la. 'llhe structure set forth in claim l2 in which the wicks in the holes in the lugs are ipeeegaa hearing lugs, said bearing lugs having 'wickf filled apertures leading upwardly from said oil-cavity to said bearings.

lln testimony whereo we have signed our names to this specilication.

ALFRED Glltllllll. NlCHOLAlUS KNAUS lubricant formed with anchor-knots at ltheir upper ends.

l5'. A sewing machine havinga'frame including a dat hed` casting having hearin lugs rising therefrom and formed with a main-oilcavity, a throat-plate supported above' said hed by certain of said lugs, a main-shatljours ree lll@

ne l 

